| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Pellucidar | Burroughs, Edgar Rice, 1875-1950 | en | Science fiction; Adventure stories; Earth -- Core -- Fiction | 1996-07-01 | |||
| At the Earth's Core | Burroughs, Edgar Rice, 1875-1950 | en | Pellucidar | Science fiction; Adventure stories; Earth -- Core -- Fiction; Fantasy fiction | 1994-04-01 |